J Cardiovasc Nurs. 2020 May/Jun;35(3):280-290. doi: 10.1097/JCN.0000000000000655.
Lay caregivers are important in contributing to self-care of patients with heart failure (HF). The Caregiver Contributions to Self-Care of Heart Failure Index (CC-SCHFI) measures these contributions, but after developing the Situation-Specific Theory of Caregiver Contributions to Heart Failure Self-Care, the CC-SCHFI needed updating to reflect the theory.
The aim of this study was to test the psychometric characteristics of the CC-SCHFI 2 that measures caregiver contributions (CC) to HF self-care with 3 scales: CC to self-care maintenance, CC to symptom perception, and CC to self-care management.
This is a cross-sectional study. We tested the CC-SCHFI 2 with confirmatory factor analysis, internal consistency, item-total correlations, and test-retest reliability. With the CC-SCHFI 2, we also administered the Self-Care of Heart Failure Index v.7.2 to patients and the Caregiver Contribution to Heart Failure Self-Care Scale to caregivers to assess concurrent validity.
A sample of 277 caregivers was enrolled (mean [SD] age, 52.7 [14.9] years; 70.4% female). In confirmatory factor analysis, each CC-SCHFI 2 scale had supportive fit indices: comparative fit index ranged between 0.94 and 0.95, and root mean square error of approximation ranged between 0.05 and 0.07. Internal consistency of the 3 scales was evident with a Cronbach α between .81 and .83 and a global reliability index between 0.79 and 0.86. Item-total correlations were all greater than 0.30. In concurrent validity testing, there were significant correlations between the CC-SCHFI 2 and the Self-Care of Heart Failure Index v.7.2 and the Caregiver Contribution to Heart Failure Self-Care Scale. Test-retest reliability showed intraclass correlation coefficients between 0.72 and 0.91.
Testing of the CC-SCHFI 2 supported validity and reliability, indicating that the instrument can be used in clinical practice and research to evaluate CC to the self-care of patients with HF.
非专业照护者在促进心力衰竭（HF）患者的自我护理方面发挥着重要作用。照护者对心力衰竭自我护理的贡献量表（CC-SCHFI）衡量了这些贡献，但在制定特定情境下的照护者对心力衰竭自我护理贡献理论之后，需要对 CC-SCHFI 进行更新以反映该理论。
本研究旨在检验 3 个分量表（照护者对自我护理维持、照护者对症状感知和照护者对自我护理管理的贡献）的 CC-SCHFI 2 测量照护者对 HF 自我护理贡献（CC）的心理测量特性。
这是一项横断面研究。我们采用验证性因子分析、内部一致性、条目-总分相关性和重测信度检验 CC-SCHFI 2。使用 CC-SCHFI 2 ，我们还对患者进行了心力衰竭自我护理指数 v.7.2 评估，对照护者进行了心力衰竭自我护理照护者贡献量表评估，以评估同时效度。
共纳入 277 名照护者（平均[标准差]年龄，52.7[14.9]岁；70.4%为女性）。在验证性因子分析中，CC-SCHFI 2 的每个分量表都具有支持性的拟合指数：比较拟合指数在 0.94 至 0.95 之间，均方根误差逼近值在 0.05 至 0.07 之间。3 个分量表的内部一致性明显，克朗巴赫 α 值在 0.81 至 0.83 之间，整体可靠性指数在 0.79 至 0.86 之间。条目-总分相关性均大于 0.30。在同时效度检验中，CC-SCHFI 2 与心力衰竭自我护理指数 v.7.2 和心力衰竭自我护理照护者贡献量表之间存在显著相关性。重测信度显示，组内相关系数在 0.72 至 0.91 之间。
CC-SCHFI 2 的检验支持了有效性和可靠性，表明该工具可用于临床实践和研究，以评估 HF 患者的自我护理照护者的贡献。
